Question

我使用Microsoft Graph SDK毫无问题地发送电子邮件，但是当我添加附件时，该附件不会出现在发送的邮件中。此处的附件类型为“斑点”。并为PDF格式。我已经解决了几个与此问题相对应的stackoverflow问题，但没有一个解决了我的问题，这就是为什么我在这里问我的问题。

    let graphMailAttachments = new Array<any>();

    //attachments is an array of blob
    attachments.forEach(async attachment => {
        let file = await new Response(attachment).arrayBuffer();

        graphMailAttachments.push({
            "contentBytes": file,
            "size": attachment.size,
            "@odata.type" : "#microsoft.graph.fileAttachment",
            "name": 'your-notes.pdf',
            "id" : this.newGuid(),
        }) 
    });

    subject = subject || "Your notes";
    body = body || "Your notes";

    let recipients = new Array<any>();
    to.forEach(receiver => {
        recipients.push({
            emailAddress:{
                address: receiver.email
            }
        })
    });

    let mail = {
        message: {
            subject: subject,
            body: {
                contentType: "Text",
                content: body,
            },
            toRecipients: recipients,
            attachments: graphMailAttachments,
        },
        SaveToSentItems : "true"
    }
    return this.graphClient.api('/me/sendMail').post(mail);

我做错什么了吗？附件只是没有出现在邮件中，有点奇怪。

Answer 1

根据他们的样本，将内容类型设置为application / pdf，然后base64编码文件字节。您看到js示例代码部分了吗？https://docs.microsoft.com/en-us/graph/api/user-sendmail?view=graph-rest-1.0&tabs=javascript#request-3

Answer 2

在通过邮件发送附件之前，您需要将附件从arraybuffer转换为base64字符串。我使用了以下方法，对我来说效果很好：

arrayBufferToBase64( buffer ) : string {
    var binary = '';
    var bytes = new Uint8Array( buffer );
    var len = bytes.byteLength;
    for (var i = 0; i < len; i++) {
        binary += String.fromCharCode( bytes[ i ] );
    }
    return btoa( binary );
}

我从this stackoverflow答案中得到了它：

Microsoft Graph发送邮件但不发送附件（javascript SDK）

2 个答案: